// 云函数入口文件
const cloud = require('wx-server-sdk');
const collection = "comments";
cloud.init({
  env: cloud.DYNAMIC_CURRENT_ENV
}) // 使用当前云环境
const db = cloud.database();
// 云函数入口函数
exports.main = async (event, context) => {
  const wxContext = cloud.getWXContext()
  let {
    comments,
    id,
    type
  } = event;
  if(type=="add"){
    db.collection(collection).add({
      data: {
        id,
        comments
      }
    });
  }else if(type=="update"){
    db.collection(collection).where({
      id
    }).update({
      data: {
        comments:db.command.unshift(comments)
      }
    });
  }
  return {
    event,
    openid: wxContext.OPENID,
    appid: wxContext.APPID,
    unionid: wxContext.UNIONID,
  }
}